EXAM IIIA - Key
All notes, books, etc., must be placed out of sight. Please read each of the problems carefully. If
something is not clear, please ask.
The exam is worth a total of 112 points. Make sure your exam
1. When did vascular plants evolve? How was this timeline uncovered?
Vascular plants evolved about 425 MYA and were discovered thru fossils in the
Silurian period. The comparison between vascular plants and green algae reveled
1. Hypothesize what type of environments make being autotrophic,
heterotrophic or mixotrophic an advantage to a protist.
Autotrophs are self-feeders which means the organism assembles their own organic
molecules from inorganic sources. P
1. Identify one reproductive
Sporophytes and gametophytes differ by the methods of reproduction.
Gametophytes produce gametes by mitosis. Sporophytes are produced from a
zygote that is for
1. Use the following classifications to determine which organism is least
related out of the three. Explain your rationale.
Table 2: Classifications
American Green Tree
European Fire- Bellied Toad
1. Based on the scientific name Streptococcus agalactiae, what morphology
would you expect these cells to have?
Coccus = Spherical
2. Name at least three animal structures that would be analogous to bacterial
Fish tail, the bod
Phosphofructokinase (1 of many regulatory enzymes) in glycolosis
PFK has an active binding site and a non-competitive binding site.
Reactants (substrates) are ATP and Fructose-6-phosphate, F6P, (or glucose derivative)
bind the bi
Adenanthos cuneatus, also known as coastal jugflower, flame bush, bridle bush and sweat bush, is a shrub of the family Proteaceae native to the south coast of Western Australia. The French naturalist Jacques Labillardire originally described it in 1805. W
Russula virescens is a basidiomycete mushroom of the genus Russula, and is commonly known as the green-cracking russula, the quilted green russula, or the green brittlegill. It can be recognized by its distinctive pale green cap that measures up to 15 cm
Banksia paludosa, commonly known as the marsh or swamp banksia, is a species of shrub in the plant genus Banksia. It is native to New South Wales, Australia, where it is found between Sydney and Batemans Bay, with an isolated population further south arou
Banksia grossa, commonly known as the coarse banksia, is a species of shrub in the plant family Proteaceae endemic to Southwest Australia. It is one of fourteen species of banksia of the series Abietinae, all of which bear predominantly cylindrical or ova
Lactarius torminosus, commonly known as the woolly milkcap or the bearded milkcap, is a large agaric fungus. A common and widely distributed species, it is found in North Africa, northern Asia, Europe, and North America. It was first described scientifica
Question 24 (2 points)
Which of the following activities decreases greenhouse gases in the atmosphere?
Question 24 options:
Cutting down trees.
Driving gasoline-powered vehicles.
Using electricity from coal power plants.
Heating your home
Question 29 (4 points)
You have formulated a hypothesis: "Pineapples contain more vitamin C than oranges." To test this
hypothesis you measure vitamin C levels in 20 oranges and 20 pineapples from trees that were grown in
the same orchard under the same e
Question 17 (2 points)
What is a recessive trait?
Question 17 options:
A trait that not everyone in your family share
A trait only visible when organisms are heterozygous for the responsible gene
A trait that a person carries but that does not affect the
Question 21 (2 points)
The Tomato Hornworm is the caterpillar stage of the five-spotted hawkmoth (Manduca
quinquemaculata). The white objects seen on the back of the caterpillar are wasp eggs. When the larvae
hatch they will feed on the worm.Which term be
Question 7 (2 points)
Which of the following statements about photosynthesis is correct?
Question 7 options:
The light dependent reaction produces glucose from sunlight energy
Oxygen is converted to carbon dioxide in the photosynthetic reaction
Question 30 (4 points)
Select all correct answers as they apply to this picture of a cell.
Question 30 options:
This is a prokaryotic cell
#1 (d, e) is a chloroplast
#1 (d, e) is the cell wall
#2 (f, g) is a mitochondria
This is an eukaryotic cell
Question 32 (10 points)
A graduate student injects 8 rats with a chemical compound commonly found in the environment and
finds that all of the rats die within a few days. Eager to publish her results, the student comes to you, her
adviser. What would you
Question 20 (2 points)
Which of he following factors in considered teh greatest threat to biodiversity today?
Question 20 options:
Habitat destruction and fragmentation
Question 23 (2 points)
Why do some scientists argue that viruses are non-living?
Question 23 options:
Viruses are able to reproduce
Viruses have an organized and complex structure
Viruses are not made of cells
Question 34 (8 points)
In early spring, Dr. Tom Wilson notices that there is an equal distribution of long and short stemmed buttercups in
the vacant lot across the street from his house as well as in his own backward. In late summer he notes that there a
Question 19 (2 points)
Why are most food chains limited to 3 to 5 trophic levels?
Question 19 options:
The higher the trophic level, the larger the organism; the larger the organism, the less likely it will be prey.
The nutritional quality of existing bio
Question 6 (2 points)
What will most likely happen if a cell's lysosomes burst?
Question 6 options:
The cell would shrivel
The cell would divide into two cells
The cell would digest itself
The cell would need to manufacture more lysosomes
Question 18 (2 points)
Biomedical scientists study species as different as worms, fruit flies, mice, zebrafish, or rhesus monkeys
to understand human genes and how they lead to diseases. Why?
Question 18 options:
Because these species have many inherited
Question 13 (2 points)
A man carries a sex-linked gene for Goltz Syndrome on his X chromosome. Who will he
pass this on to?
Question 13 options:
All of his daughters
Half of his daughters
All of his sons
Half of his sons